Abstract:
AIMS:To evaluate the prevalence, clinical significance, and prognosis of latent Brugada syndrome (BrS) in patients with new-onset atrial fibrillation (AF) unmasked by class 1C antiarrhythmic drugs. METHODS AND RESULTS:Between January 2000 and June 2008, all consecutive patients with new-onset AF, who after flecainide exhibited typical Brugada ECG pattern, underwent electrophysiologic, pharmacologic, and genetic testing. Among 346 patients [median age 53 years; interquartile range (IQR), 15], 11 (3.2%; median age 51 years; IQR, 19) diagnosed as lone AF exhibited typical Brugada ECG pattern. Genetic testing was negative. Ventricular tachycardia/ventricular fibrillation (VT/VF) was induced by electrophysiologic testing (five patients) or during flecainide infusion (one patient). Six patients with type 1 ECG pattern and inducible VT/VF underwent ICD implantation. During a median follow-up of 31.5 months (range: 10-85) after ICD implantation, three patients developed BrS and one of them experienced VF. Patients without ICD (five patients) remained asymptomatic during a median follow-up of 74 months. Persistent type 1 pattern occurred only in the three patients who developed BrS. CONCLUSION:This study, for the first time, reveals the prevalence of latent BrS in patients with new-onset lone AF, which may precede VT/VF. Persistence of type 1 and ventricular tachyarrhythmias inducibility represents a marker of electrical instability leading to sudden death.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Pappone C,Radinovic A,Manguso F,Vicedomini G,Sala S,Sacco FM,Ciconte G,Saviano M,Ferrari M,Sommariva E,Sacchi S,Ciaccio C,Kallergis EM,Santinelli Vdoi
10.1093/eurheartj/ehp326subject
Has Abstractpub_date
2009-12-01 00:00:00pages
2985-92issue
24eissn
0195-668Xissn
1522-9645pii
ehp326journal_volume
30pub_type
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